Communications: directive radio wave systems and devices (e.g. – With particular circuit – Spectrum analysis
Patent
1992-10-01
1994-07-05
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Spectrum analysis
324 7637, 324 7631, 359191, G01S 7285, G01R 2317
Patent
active
053271424
ABSTRACT:
The circuit may be used to encode the channel outputs of a Bragg cell receiver, or other type of channelized receiver. Bragg cell receivers use acousto-optic delay lines to analyze signals such as radar pulses present in the Electronic Warfare (EW) environment. These receivers require high probability of intercept with low false alarm rates. The present design in determining frequency from a Bragg receiver is by comparing the amplitude from adjacent outputs. If the output of a certain channel is higher than its neighboring ones and the signal crosses threshold, the frequency of the input signal is determined by that channel. There is one major deficiency from this approach, that is, the design generates false alarms. A frequency encoding circuit is proposed which uses five adjacent channels to make a decision on whether a given output is a true signal, or a false alarm. With this approach, two guard channels will be needed at both ends of the channels.
REFERENCES:
patent: 3732565 (1973-02-01), Symaniec et al.
patent: 4328576 (1982-05-01), Oakley
patent: 4610540 (1986-09-01), Mossey
patent: 4644267 (1987-02-01), Tsui et al.
patent: 4909627 (1990-03-01), Brousseau
patent: 5153597 (1992-10-01), Hueber et al.
patent: 5191346 (1993-03-01), Avignon et al.
J. B. Y. Tsui, WL/AAWP-1, E. T. Gill, Litton Applied Tech, The International Society for Optical Engineering (SPIE) Optical Tech For Microwave Appl. V Apr. 1991, vol. 1476, pp. 190-200.
Caschera Joseph
Tsui James B. Y.
Barron Jr. Gilberto
Franz Bernard E.
Kundert Thomas L.
The United States of America as represented by the Secretary of
LandOfFree
Frequency encoding circuit in Bragg cell receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency encoding circuit in Bragg cell receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency encoding circuit in Bragg cell receiver will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-798911